#include <cstddef>
#include <iostream>
 
template<class P >
void functionTemplate(P p) {
    int* a = p;
}
 
int main() {
    int* a = 0;           
    int* b = NULL;              
    int* c = nullptr;
 
    functionTemplate(0);   
    functionTemplate(NULL);
    functionTemplate(nullptr);  
}                        
